. >> in a surprise appearance from the white house, first lady michelle obama announced the winner for best picture. ben affleck, not nominated for best director, expressed his gratitude for this win. >> it doesn't matter how you get knocked down in life, because that's going to happen, all that matters is you to get up. i love you. >> in the best actress category, a bit of a stumble. >> you guys are standing up because you feel bad that i fell. that's really embarrassing. thank you. >> reporter: jennifer lawrence winning for her role in "silver linings playbook," later celebrating with her family at the governor's ball. >> and the oscar goes to daniel day-lewis. >> three-time oscar winner meryl streep presented the award to daniel day lewis for his role in "lincoln." >> i had actually been committed to play margaret thatcher. >> in the directing category, ang lee won for "life of pi." >> thank you, movie god. thank you. >> for "django unchained", christoph waltz won for best supporting actor. while quentin tare ren tino won for screenplay. for best supporting actress, the oscar went t